Libstored 2.0.0

README.md

@@ -57,11 +57,13 @@ flowchart TD
 - TerminalLayer
 - Crc8Layer (0xA6)
 - Crc16Layer (0xBAAD)
+- Crc32Layer (reversed 0x04c11db7)
 - LoggingLayer using ILogger
 - LoopbackLayer
 - BufferLayer
 - SegmentationLayer
 - ArqLayer
+- IdleCheckLayer
 
 ### Transport layers
 - ZeroMQ using [NetMQ](https://netmq.readthedocs.io/)
@@ -170,12 +172,15 @@ python -m libstored.gui -p 5555
 
 ## Compatibility
 
-Tested with:
-- [v1.7.1](https://github.com/DEMCON/libstored/releases/tag/v1.7.1) (see note  below)
+Tested with libstored versions:
+- [v2.0.0](https://github.com/DEMCON/libstored/releases/tag/v2.0.0)
 - [v1.8.0](https://github.com/DEMCON/libstored/releases/tag/v1.8.0)
+- [v1.7.1](https://github.com/DEMCON/libstored/releases/tag/v1.7.1) (see note below)
 
 See [libstored changelog](https://demcon.github.io/libstored/doc/changelog.html) for the changes. There do not seem to be breaking changes from <v1.7.1 to v1.7.1 for this C# implementation.
 
+Only the latest major version of libstored will be supported.
+
 ### libstored >v1.7.1
 The ZeroMQ socket type changed from `PAIR` to `DEALER` for the SyncZeroMQLayer. Make sure the exact same socket type is used at both ends of the protocol, so `PAIR` - `PAIR` or `DEALER` - `DEALER`, but not `PAIR` - `DEALER`. When connecting to libstored v1.7.1 or lower, use the `PAIR` socket type. For version v1.8 or higher of libstored, use `DEALER`.
 

examples/Arq/LibStored.Arq/Dockerfile

@@ -1,11 +1,13 @@
 # Add ARG for libstored version
-ARG LIBSTORED_VERSION=1.8.0
+ARG LIBSTORED_VERSION=2.0.0
 
 FROM ubuntu:22.04 as builder
 
 # Use the ARG after FROM
 ARG LIBSTORED_VERSION
 
+RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
+
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         build-essential \
@@ -19,6 +21,7 @@ RUN apt-get update && \
         plantuml \
         python3-venv \
         python3-dev \
+        python3-tk \
         lsb-release \
         libgl1 \
         libegl1 \
@@ -62,4 +65,4 @@ COPY --from=builder /app /app
 
 WORKDIR /app/bin
 
-CMD ["./arq"]
+CMD ["./arq"]

examples/Arq/LibStored.Net.Arq.AppHost/AppHost.cs

@@ -2,7 +2,7 @@
 
 var builder = DistributedApplication.CreateBuilder(args);
 
-const string libstoredVersion = "1.8.0";
+const string libstoredVersion = "2.0.0";
 var arq = builder.AddDockerfile("libstored-arq", "../LibStored.Arq/", "Dockerfile")
         .WithImage("demcon/libstored-arq-example")
         .WithImageTag(libstoredVersion)

examples/Directory.Build.props

@@ -0,0 +1,8 @@
+<Project>
+  <Import Project="..\Directory.Build.props" />
+  <PropertyGroup>
+    <!-- Only use a single framework for the examples -->
+    <TargetFrameworks>net10.0</TargetFrameworks>
+    <TargetFramework>net10.0</TargetFramework>
+  </PropertyGroup>
+</Project>

examples/Sync/LibStored.Net.Example.AppHost/Dockerfile

@@ -1,11 +1,13 @@
 # Add ARG for libstored version
-ARG LIBSTORED_VERSION=1.8.0
+ARG LIBSTORED_VERSION=2.0.0
 
 FROM ubuntu:22.04 as builder
 
 # Use the ARG after FROM
 ARG LIBSTORED_VERSION
 
+RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
+
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         build-essential \
@@ -19,6 +21,7 @@ RUN apt-get update && \
         plantuml \
         python3-venv \
         python3-dev \
+        python3-tk \
         lsb-release \
         libgl1 \
         libegl1 \

examples/Sync/LibStored.Net.Example.AppHost/LibStored.Net.Example.AppHost.csproj

@@ -1,6 +1,6 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
-  <Sdk Name="Aspire.AppHost.Sdk" Version="13.0.0" />
+  <Sdk Name="Aspire.AppHost.Sdk" Version="13.0.1" />
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
@@ -10,9 +10,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Aspire.Hosting.AppHost" Version="13.0.0" />
-    <PackageReference Include="Aspire.Hosting.Docker" Version="13.0.0-preview.1.25560.3" />
-    <PackageReference Include="Aspire.Hosting.Python" Version="13.0.0" />
+    <PackageReference Include="Aspire.Hosting.AppHost" Version="13.0.1" />
+    <PackageReference Include="Aspire.Hosting.Docker" Version="13.0.1-preview.1.25575.3" />
+    <PackageReference Include="Aspire.Hosting.Python" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>

examples/Sync/LibStored.Net.Example.AppHost/Program.cs

@@ -12,7 +12,7 @@
 
 builder.AddDockerComposeEnvironment("docker-compose");
 
-const string libstoredVersion = "1.8.0";
+const string libstoredVersion = "2.0.0";
 var sync = builder.AddDockerfile("libstored", ".", "Dockerfile")
     .WithImage("demcon/libstored")
     .WithImageTag(libstoredVersion)

examples/Sync/LibStored.Net.Example.AppHost/python/requirements.txt

@@ -1 +1 @@
-libstored==1.7.1
+libstored==2.0.0

examples/Sync/README.md

@@ -0,0 +1,21 @@
+# Sync Example
+
+This example demonstrates cross-language synchronization between C++ and C# using the [Aspire CLI](https://aspire.dev/docs/cli/). The setup is based on the [8_sync](https://github.com/DEMCON/libstored/tree/main/examples/8_sync) example from the libstored project.
+
+In this example, the C++ code runs inside a container, while the C# implementation runs natively. The `libstored.gui` Python library connects to both the C++ and C# components, allowing you to observe and interact with the synchronizated stores.
+
+## Prerequisites
+
+- [.NET 10 SDK](https://dotnet.microsoft.com/download)
+- [Aspire CLI](https://aspire.dev/docs/cli/)
+- [Podman](https://podman.io/) or [Docker](https://www.docker.com/products/docker-desktop)
+
+## Running the Example
+
+```sh
+aspire run
+```
+
+## Learn More
+
+- [Aspire Documentation](https://aspire.dev/docs/)

src/LibStored.Net/Protocol/Crc16Layer.cs

@@ -72,7 +72,7 @@ public override void Decode(Span<byte> buffer)
             crc = Compute(buffer[i], crc);
         }
 
-        if (crc != (ushort)(buffer[buffer.Length - 2] << 8 | buffer[buffer.Length - 1]))
+        if (crc != BinaryPrimitives.ReadUInt16BigEndian(buffer.Slice(buffer.Length - 2, 2)))
         {
             // CRC mismatch, ignore the packet
             _logger?.LogWarning("Invalid crc check: {Actual}, expected: {Expected}", buffer[^1], crc);

src/LibStored.Net/Protocol/Crc32Layer.cs

@@ -0,0 +1,140 @@
+// SPDX-FileCopyrightText: 2025 Guus Kuiper
+//
+// SPDX-License-Identifier: MIT
+
+using System.Buffers.Binary;
+using Microsoft.Extensions.Logging;
+
+namespace LibStored.Net.Protocol;
+
+/// <summary>
+/// A protocol layer that adds a 32-bit CRC (reversed polynomial 0x04c11db7) for message integrity.
+/// Calculates and verifies CRC values for encoded and decoded messages.
+/// </summary>
+public class Crc32Layer : ProtocolLayer
+{
+    private static readonly uint[] crc32Table =
+    [
+	    0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535,
+	    0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD,
+	    0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D,
+	    0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
+	    0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4,
+	    0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
+	    0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC,
+	    0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
+	    0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB,
+	    0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F,
+	    0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB,
+	    0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
+	    0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA,
+	    0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE,
+	    0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A,
+	    0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
+	    0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409,
+	    0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
+	    0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739,
+	    0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
+	    0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268,
+	    0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0,
+	    0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8,
+	    0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+	    0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF,
+	    0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703,
+	    0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7,
+	    0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
+	    0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE,
+	    0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
+	    0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6,
+	    0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
+	    0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D,
+	    0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5,
+	    0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605,
+	    0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
+	    0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D,
+    ];
+
+    private readonly ILogger<Crc32Layer>? _logger;
+    private readonly uint _init = 0xffffffff;
+    private readonly uint _finalXor = 0xffffffff;
+    private uint _crc;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="Crc32Layer"/> class.
+    /// </summary>
+    /// <param name="logger">Optional logger for CRC warnings.</param>
+    public Crc32Layer(ILogger<Crc32Layer>? logger = null)
+    {
+        _logger = logger;
+        _crc = _init; // Initialize CRC to the initial value
+    }
+
+    /// <summary>
+    /// Decodes a buffer, verifying the CRC and passing valid data to the next layer.
+    /// </summary>
+    /// <param name="buffer">The buffer to decode, including CRC bytes.</param>
+    public override void Decode(Span<byte> buffer)
+    {
+        if (buffer.Length < 4)
+        {
+            return;
+        }
+
+        uint crc = _init;
+        for (int i = 0; i < buffer.Length - 4; i++)
+        {
+            crc = Compute(buffer[i], crc);
+        }
+
+        uint bufferCrc = BinaryPrimitives.ReadUInt32BigEndian(buffer.Slice(buffer.Length - 4, 4));
+        if ((crc ^ _finalXor) != bufferCrc)
+        {
+            // CRC mismatch, ignore the packet
+            _logger?.LogWarning("Invalid crc check: {Actual}, expected: {Expected}", bufferCrc, crc);
+            return;
+        }
+
+        base.Decode(buffer.Slice(0, buffer.Length - 4));
+    }
+
+    /// <summary>
+    /// Encodes a buffer, updating the CRC and appending it when the message is complete.
+    /// </summary>
+    /// <param name="buffer">The data to encode.</param>
+    /// <param name="last">Indicates if this is the last buffer in the message.</param>
+    public override void Encode(ReadOnlySpan<byte> buffer, bool last)
+    {
+        foreach (byte b in buffer)
+        {
+            _crc = Compute(b, _crc);
+        }
+
+        base.Encode(buffer, false);
+
+        if (last)
+        {
+            uint crc = _crc ^ _finalXor;
+            byte[] crcBytesBig = new byte[4];
+            BinaryPrimitives.WriteUInt32BigEndian(crcBytesBig, crc);
+            base.Encode(crcBytesBig, true);
+            _crc = _init; // Reset CRC for the next message
+        }
+    }
+
+    /// <inheritdoc />
+    public override void Reset()
+    {
+        _crc = _init;
+        base.Reset();
+    }
+
+    /// <inheritdoc />
+    public override int Mtu() => base.Mtu() switch
+    {
+        0 => 0,
+        <= 5 => 1,
+        var x => x - 4,
+    };
+
+    private uint Compute(byte input, uint crc) => crc32Table[input ^ (byte)(crc & 0xFF)] ^ (crc >> 8);
+}

src/LibStored.Net/Protocol/IdleCheckLayer.cs

@@ -0,0 +1,52 @@
+// SPDX-FileCopyrightText: 2025 Guus Kuiper
+//
+// SPDX-License-Identifier: MIT
+
+namespace LibStored.Net.Protocol;
+
+/// <summary>
+/// A layer that tracks if it sees communication through the stack.
+///
+/// This may be used to check of long inactivity on stalled or disconnected
+/// communication channels.
+/// </summary>
+public class IdleCheckLayer : ProtocolLayer
+{
+    /// <summary>
+    /// Checks if upstream was idle since the last call to <see cref="SetIdle"/>
+    /// </summary>
+    public bool IdleUp { get; private set; } = true;
+
+    /// <summary>
+    /// Checks if downstream was idle since the last call to <see cref="SetIdle"/>
+    /// </summary>
+    public bool IdleDown { get; private set; } = true;
+
+    /// <summary>
+    /// Checks if both up and down the stack was idle since the last call to <see cref="SetIdle"/>.
+    /// </summary>
+    public bool Idle => IdleUp && IdleDown;
+
+    /// <summary>
+    /// Resets the idle flags.
+    /// </summary>
+    public void SetIdle()
+    {
+        IdleUp = true;
+        IdleDown = true;
+    }
+
+    /// <inheritdoc />
+    public override void Decode(Span<byte> buffer)
+    {
+        IdleUp = false;
+        base.Decode(buffer);
+    }
+
+    /// <inheritdoc />
+    public override void Encode(ReadOnlySpan<byte> buffer, bool last)
+    {
+        IdleDown = false;
+        base.Encode(buffer, last);
+    }
+}